87634-62-6Relevant articles and documents
Pd(ii)-Catalyzed alkyne annulation through allylic isomerization: synthesis of spiro-cyclopentadiene pyrazolones
Changmai, Sumi,Sultana, Sabera,Sarma, Bipul,Gogoi, Sanjib
supporting information, p. 6027 - 6030 (2021/06/21)
The Pd(ii)-catalyzed activation of Csp2-H bond and double alkyne annulation which proceedsviaallylic isomerization is reported for the first time. This reaction of antipyrines with alkynes provides an efficient synthetic route for the biologically important spiro-cyclopentadiene pyrazolones. In the presence of Lawesson's reagent, this Pd(ii)-catalyzed annulation reaction affords another spiro-cyclopentadiene pyrazolone which displays very good fluorescence properties.
An easy direct arylation of 5-pyrazolones
Gong, Hao,Yang, Yiwen,Wang, Zechao,Kuang, Chunxiang
supporting information, p. 2033 - 2039 (2013/11/06)
A mild, efficient and catalytic ligand-free method for the direct arylation of 5-pyrazolones by Pd-catalyzed C-H bond activation is reported. The process smoothly proceeds and yields are moderate to excellent.
4-amino-2-methyl-3-phenyl-1-(2,4,6-trichlorophenyl)-3-pyrazolin-5-one
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, (2008/06/13)
Compounds are disclosed which are 4-amino-2,3-di-substituted-1-(mono- or trichlorophenyl)-3-pyrazolin-5-ones represented by the following formulae (1) to (3): STR1 and acid addition salts thereof. The compounds can be easily produced and are useful for qu
